package com.roroldo.springcloud.alibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.roroldo.springcloud.alibaba.controller.handler.CustomerBlockHandler;
import com.roroldo.springcloud.entities.CommonResult;
import com.roroldo.springcloud.entities.Payment;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * 自定义限流兜底处理规则
 *
 * @author 落霞不孤
 */
@RestController
public class RateLimitController {
    @GetMapping("/byResource")
    @SentinelResource(value = "byResource", blockHandler = "handleException")
    public CommonResult byResource() {
        return new CommonResult(200, "按资源名称限流测试OK", new Payment(2022L, "serial001"));
    }

    // 方法必须是 public，此方法返回值需要与上面的一致，参数也必须一致，可以多出一个 Throwable 用来接受异常
    public CommonResult handleException(BlockException exception) {
        return new CommonResult(444, exception.getClass().getCanonicalName() + "\t 服务不可用");
    }

    @GetMapping("/rateLimit/byUrl")
    @SentinelResource(value = "byUrl")
    public CommonResult byUrl() {
        return new CommonResult(200, "按url限流测试OK", new Payment(2020L, "serial002"));
    }

    /*
     自定义通用的限流处理逻辑，
         blockHandlerClass = CustomerBlockHandler.class
         blockHandler = handleException2
     上述配置：找 CustomerBlockHandler 类里的 handleException2 方法进行兜底处理
     */
    /**
     * 自定义通用的限流处理逻辑
     */
    @GetMapping("/rateLimit/customerBlockHandler")
    @SentinelResource(value = "customerBlockHandler",
            blockHandlerClass = CustomerBlockHandler.class, blockHandler = "handleException2")
    public CommonResult customerBlockHandler() {
        return new CommonResult(200, "按客户自定义限流处理逻辑");
    }
}
